Exam-style question
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Which medium is most susceptible to electromagnetic interference and is best suited for short‑distance, low‑cost applications?.
- A.Fiber optic cable
- B.Coaxial cable
- C.Twisted pair
- D.Wireless radio
Model answer
What a good answer should say
- Twisted pair
Explanation
Why this works
Both twisted pair and coaxial cable are copper media, but twisted pair uses two wires twisted together to reduce interference. The main difference is that twisted pair is more vulnerable to EMI than coaxial but is cheaper and adequate for short runs.
Twisted pair is therefore preferred for inexpensive, short‑distance connections like office LANs.
Common mistake
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